How do I find out how many devices are connected to my WiFi router?

It's often perplexing when your home internet suddenly slows down, pages take a long time to load, and videos constantly buffer. You pay for high speeds, but the actual network response doesn't match the advertised rate. One of the most common causes of this behavior is unauthorized connections to your wireless network.

Furthermore, even if you're confident in the security of your password, the number of gadgets in modern households is growing exponentially. Smartphones, tablets, smart lamps, TVs, game consoles, and vacuum cleaners all require a constant connection. Sometimes it's crucial to simply understand whether you've exceeded your active client limit or which device is currently hogging all your bandwidth.

In this article, we'll take a detailed look at software and hardware methods for monitoring your local network. We'll cover both standard methods via the router's web interface and specialized scanning software. You'll learn not only how to view the guest list but also how to identify them and block uninvited visitors.

⚠️ Attention: Router interfaces from different manufacturers (TP-Link, ASUS, Zyxel, D-Link) can vary significantly. The names of the tabs and menu items in this article are provided as guidelines, but the actual location of the settings depends on the firmware version of your device.

Using the router's web interface

The most reliable and accurate way to obtain information about connected clients is to access your router's administrative panel directly. The router is the central hub of the network, so it has the most complete and up-to-date information about all active connections. To access it, you'll need the gateway IP address (usually 192.168.0.1 or 192.168.1.1) and your administrator credentials.

Once logged in, look for sections with names like "Client List," "Status," "Wireless," or "LAN." On modern models, such as Keenetic or MikroTikThis information is often displayed directly on the main screen in the form of a convenient graphical list. Here you'll see IP addresses, MAC addresses, and often device names.

It's important to distinguish between wired and wireless connections. The list may show devices connected via cable (Ethernet), which don't pose a threat to WiFi theft but do consume bandwidth. Pay attention to the connection type, which is usually marked with an icon or label. WLAN or Wireless for WiFi clients.

Mobile applications for administration

Network equipment manufacturers have long realized that accessing settings through a computer browser is inconvenient. Therefore, for most modern routers, including popular models, TP-Link Archer And ASUS RT, proprietary mobile apps have been developed. They allow you to control the network from literally anywhere in the apartment.

Applications such as Tether (for TP-Link), ASUS Router or My Keenetic, provide network visualization. You can see not just a list, but a complete map of connections. Apps often show the data transfer speed for each device in real time, which helps instantly identify heavy users downloading torrents or updating games.

The convenience of mobile utilities lies in the ability to instantly block. If you see an unfamiliar device, you don't need to delve into complex security settings. Simply click the "Block" or "Deny Access" button next to the offender's name, and they'll be disconnected from the network within a second.

• 📱 Availability: Network control is possible from a smartphone in any room, without being tied to a computer.
• 🛡️ Notifications: Many applications can send push notifications when a new device is connected.
• 👨‍👩‍👧‍👦 Parental control: Monitoring functions are often supplemented with the ability to limit access time for children.

Third-party network scanning programs

If access to your router is blocked for some reason, or the built-in functionality seems too limited, third-party network scanning utilities can help. These programs run on your computer or smartphone and send specific requests to all devices on the local network, collecting responses.

One of the most popular and powerful programs is Advanced IP Scanner for Windows. It works quickly, requires no installation, and displays not only IP and MAC addresses, but also attempts to identify the network card manufacturer (Vendor). This helps you understand what kind of device is connected: if the manufacturer is listed as Apple, most likely it's an iPhone or MacBook, and if Hon Hai Precision - it could be a gaming laptop or console.

For Android-based mobile devices, an excellent solution is the app FingIt scans your WiFi network and generates a detailed report. What makes these programs unique is that they can reveal devices that are hidden or not displayed correctly in the router interface due to firmware errors.

⚠️ Attention: Antivirus programs may detect network scanners as a potential threat, as these utilities use the same methods hackers use to conduct network reconnaissance. Add scanners to your exceptions if you are sure of the download source.

MAC address and device name analysis

Simply seeing a list of ten lines of numbers isn't enough. A key skill for a home network administrator is the ability to read and interpret MAC addresses. A MAC (Media Access Control) address is a unique identifier assigned to a network interface during manufacturing. It consists of 12 hexadecimal characters.

The first six characters (three bytes) of a MAC address are called the OUI (Organizationally Unique Identifier) ​​and identify the device manufacturer. Knowing these codes allows you to pinpoint who is connected. For example, addresses starting with B8:27:EB, are owned by the Raspberry Pi Foundation, and 00:1A:79 — this is Google Cast (Chromecast).

Device names (Hostname) also provide clues, but they shouldn't always be trusted blindly. Users often don't change the default names, so you might see them in the list. DESKTOP-4F8G2H1 or MI PHONE. However, if you see a device named HP-Printer, and you don’t have a printer, this is a clear alarm signal.

What if the MAC address is changed?

Some advanced users may want to use the MAC address randomization feature to protect their privacy. This will cause the device to present itself with a different address each time, forcing you to rely on the manufacturer's name or the amount of data it uses.

Command Prompt and PowerShell for Diagnostics

For users who prefer to work without a graphical interface, or in situations where they need to quickly retrieve information on someone else's computer, the operating system's built-in tools are ideal. The Windows command line or Linux/macOS terminal provide access to the ARP (Address Resolution Protocol) table.

The ARP table contains mappings between IP addresses and physical MAC addresses of devices with which your computer communicates. To view this list, open the command prompt (press Win + R, enter cmd and press Enter) and enter the command:

arp -a

You'll see a list of all devices that responded to your machine's requests. Please note that this may not include all devices on the network, only those with which there has been active communication recently. For a more in-depth analysis, you can use PowerShell with the command Get-NetNeighbor, which will show the neighbor's state (Reachable, Stale, etc.).

This method is advantageous for its speed and lack of need to install additional software. However, it is less informative than the router's web interface, as it doesn't display bandwidth usage or allow access control.

Protective measures and blocking of violators

Once you've identified the intruder, you need to take steps to secure your perimeter. The simplest, but not always effective, measure is to change your WiFi password. This will force all devices to reconnect, and you'll only be able to re-enter the password on your own devices. However, if the password was stolen through a virus on one of your PCs, changing the password will only provide a temporary solution.

A more reliable method is MAC filtering. You can create a "White List" in your router settings, which only includes authorized addresses. All other devices, even with the correct password, will be physically unable to connect to the access point. This is the most restrictive, but also the most labor-intensive method, as every time you buy a new phone, you'll have to manually enter its address into the router settings.

It is also worth checking if the function is activated WPS (Wi-Fi Protected Setup). This technology, designed to simplify connection, has known vulnerabilities that allow someone to brute-force the PIN code and gain network access in a matter of hours. In modern routers, such as Keenetic or Asus, It's best to keep WPS turned off unless you're using it right now.

⚠️ Attention: Be extremely careful when enabling MAC address filtering. If you whitelist the wrong address or forget to whitelist your current PC, you could block your own access and lose the ability to manage the router via WiFi. Always leave one Ethernet cable connected for emergency access.

Frequently Asked Questions (FAQ)

Can my neighbor see my files if he is connected to my WiFi?

Simply being connected to the same WiFi network doesn't automatically grant access to your personal files on your computer. However, if you have Network Discovery and folder sharing enabled, an attacker could theoretically attempt to scan the network for open resources. It's recommended to set the network profile to "Public" to hide your PC from others.

Why are "Unknown devices" showing in the device list?

This often happens with smart home devices (light bulbs, sockets, sensors). They may not transmit the correct hostname or use specific protocols that the router cannot identify. If the number of such devices matches the number of your smart appliances, there's no need to worry.

Does the number of connected devices affect internet speed?

Yes, it does. The WiFi channel is a shared medium. Even if a "neighbor" is simply browsing the internet and not downloading anything, they're using up airtime to maintain the connection. If they start watching 4K video, the speed for all other users will drop dramatically, as the radio channel's bandwidth is divided among all active clients.

How often should I change my WiFi password?

There's no need to change your password every week if you use a complex combination (more than 12 characters, numbers, and special characters) and WPA2/WPA3 encryption. It's sufficient to change it if you suspect a hack or if someone who knows the password leaves (for example, tenants or guests). The main thing is to avoid using simple passwords like your date of birth or phone number.